ALC650 + Mic input not working

ALC650 + Mic input not working

[p z oooo]

Hi,

I have MSI KT333 (VIA8233A) + ALC650.
For me, mic input is not working.
It looks like my motherboard (and some of others too) uses GPIO0 pin 
of ALC650 to swich mic bias on/off. Look at ALC650AppNotes_1.4.pdf 
page 3 (this is recomended connection). ALC650 rev.E doesn't need 
this (and than mic is working). I tested attached patch and mic (sets 
bit 0 in reg. 0x76 to 1 - gpio0 = output and bit 8 in reg. 0x76 to 1 
= set mic bias - gpio0 - on) works, but I think it is not good, 
because when mic input is switched to center/LFE output, mic bias 
should be set to off.

Peter Zubaj




====================== REKLAMA =================================
Získajte supervýhodné ADSL ešte výhodnejšie v cenovom odpočítavaní Slovanet
ADSL Teraz! Čím skôr sa rozhodnete, tým viac ušetríte.
http://www.slovanet.sk/menu/adsl.html



-------------------------------------------------------
This SF.net email is sponsored by: If flattening out C++ or Java
code to make your application fit in a relational database is painful,
don't do it! Check out ObjectStore. Now part of Progress Software.
http://www.objectstore.net/sourceforge

Re: ALC650 + Mic input not working

[Takashi Iwai]

At Mon, 19 May 2003 07:54:46 +0200,
p z oooo wrote:
> 
> Hi,
> 
> I have MSI KT333 (VIA8233A) + ALC650.
> For me, mic input is not working.
> It looks like my motherboard (and some of others too) uses GPIO0 pin 
> of ALC650 to swich mic bias on/off. Look at ALC650AppNotes_1.4.pdf 
> page 3 (this is recomended connection). ALC650 rev.E doesn't need 
> this (and than mic is working). I tested attached patch and mic (sets 
> bit 0 in reg. 0x76 to 1 - gpio0 = output and bit 8 in reg. 0x76 to 1 
> = set mic bias - gpio0 - on) works, but I think it is not good, 
> because when mic input is switched to center/LFE output, mic bias 
> should be set to off.

hmm, i don't see any files... ;)


Takashi


-------------------------------------------------------
This SF.net email is sponsored by: If flattening out C++ or Java
code to make your application fit in a relational database is painful, 
don't do it! Check out ObjectStore. Now part of Progress Software.
http://www.objectstore.net/sourceforge

Re: ALC650 + Mic input not working

[p z oooo]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: TEXT/plain; CHARSET=US-ASCII, Size: 290 bytes --]

Sorry, here it is, but this is only half solution.

Peter Zubaj



====================== REKLAMA =================================
Získajte supervýhodné ADSL e¹te výhodnej¹ie. Ceny u¾ od 399 Sk mesaène bez
DPH. By» rýchly sa naozaj oplatí. http://www.slovanet.sk/menu/adsl.html


[-- Attachment #2: E:\patches\MSI_KT333.diff --]
[-- Type: APPLICATION/octet-stream, Size: 574 bytes --]

--- ac97_patch.c.old	2003-04-07 14:26:27.000000000 -0100
+++ ac97_patch.c	2003-05-18 09:01:01.000000000 -0100
@@ -374,6 +374,13 @@
 	val &= ~0xc000; /* slot: 3,4,7,8,6,9 */
 	snd_ac97_write_cache(ac97, AC97_ALC650_MULTICH, val);
 
+	val = snd_ac97_read(ac97, 0x76);
+	val = val | 1;
+	snd_ac97_write_cache(ac97, 0x76, val);
+	val = snd_ac97_read(ac97, 0x78);
+	val = val | 0x100;
+	snd_ac97_write_cache(ac97, 0x78, val);
+
 	/* full DAC volume */
 	snd_ac97_write_cache(ac97, AC97_ALC650_SURR_DAC_VOL, 0x0808);
 	snd_ac97_write_cache(ac97, AC97_ALC650_LFE_DAC_VOL, 0x0808);

Re: ALC650 + Mic input not working

[p z oooo]

and reg. 
0x76 - bit 0 
0x78 - bit 8 (not 0x76)

Peter Zubaj
====================== REKLAMA =================================
Získajte supervýhodné ADSL ešte výhodnejšie v cenovom odpočítavaní Slovanet
ADSL Teraz! Čím skôr sa rozhodnete, tým viac ušetríte.
http://www.slovanet.sk/menu/adsl.html



-------------------------------------------------------
This SF.net email is sponsored by: If flattening out C++ or Java
code to make your application fit in a relational database is painful,
don't do it! Check out ObjectStore. Now part of Progress Software.
http://www.objectstore.net/sourceforge

Re: ALC650 + Mic input not working

[Takashi Iwai]

At Mon, 19 May 2003 11:59:28 +0200,
p z oooo wrote:
> 
> [1  <text/plain; US-ASCII (quoted-printable)>]
> Sorry, here it is, but this is only half solution.

i added an experimental code for ALC650 to detect the reveion E and
initializes GPIO0 according to the Mic/Center switch.
it's now on cvs.  could you check whether it works for you?


Takashi


-------------------------------------------------------
This SF.net email is sponsored by: ObjectStore.
If flattening out C++ or Java code to make your application fit in a
relational database is painful, don't do it! Check out ObjectStore.
Now part of Progress Software. http://www.objectstore.net/sourceforge

Re: ALC650 + Mic input not working

[Takashi Iwai]

At Wed, 21 May 2003 08:04:44 +0200,
p z oooo wrote:
> 
> Hi,
> 
> I tested code and it doesn't work :-(.
> When I deleted code to detect ALC650 rev.E, it worked perfect. :-)
> 
> May be:
> 1) MSI uses ALC650 rev.E and stil uses gpio0 to switch mic power 
> on/off
> 2) detection code for ALC650 rev.E is wrong

most likely the latter...
perhaps chaging GPIO0 won't affect the behavior of rev.E.
i'll remove it.


thanks,

Takashi


-------------------------------------------------------
This SF.net email is sponsored by: ObjectStore.
If flattening out C++ or Java code to make your application fit in a
relational database is painful, don't do it! Check out ObjectStore.
Now part of Progress Software. http://www.objectstore.net/sourceforge